Discriminating among symbiotic relationships

1
Species Interactions

• Discriminating among symbiotic relationships

2
What is symbiosis?
Literal definition the act of living together

• What it means
• Two or more organisms that live together in
  direct contact.
• At least one of the organisms benefits from
  the relationship.

3
What are the different kinds of symbiosis?
Mutualism

• Parasitism

Commensalism
both organisms benefit
one organism benefits
one organism benefits
one organism is unaffected
one organism is harmed
4
Example 1 Anopheles mosquito w/ Plasmodium
Mosquites infect organisms w/ Plasmodium. Malaria
parasite flourishes while organism gets sick.
Parasitism one benefits, one is harmed
5
Mutualism both benefit
Example 2 Moray Eel with Cleaner Fish
Moray Eel gets a clean mouth Cleaner Fish gets a
meal
6
Example 3 Cattle with cattle egrets
Cattle stir up insects as they eat grassEgrets
hang around eat insects
Commensalism one benefits, one is unaffected
7
Example 4 Clown fish with anemone
Clown fish gets protection Anemone is unaffected
Commensalism one benefits, one is unaffected
8
Mutualism both benefit
Example 5 Antelope with Oxbird
Antelope gets rid of parasites Oxbird gets a meal
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Example 6 Taenia worm in human eye
Worm infects human blood streamHuman may go blind
Parasitism one benefits, one is harmed
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Ex 7 Ants and aphids

• Ants feed on the sugary honeydew left behind by
  aphids.
• In exchange, the ants protect the aphids from
  predators and parasites.
• 
  
• 
  Mutualism

11
Ex 8 Sea turtles and reef fish.

• Commensalism- Reef fish eat algae that grows on
  the shell of sea turtles

12
Strangler fig trees of the rain forest

• The strangler fig trees root system grows on the
  branches of other trees.
• This results in the death of the other trees.

Parasitism
13
Barnacles on a grey whale

• Commensalism